我新增了一个API, books, 对应的文件： BOOKS.js 和create.js , 可总是提示：

“success”: false, “name”: “TypeError”, “message”: “Cannot read property ‘findOne’ of undefined”, “stack”: [ “TypeError: Cannot read property ‘findOne’ of undefined”, " at /home/lupy/change/server/controllers/Books/create.js:46:34",

	我这样写'findOne'有错吗?
	
	详细见图
	![2.png](//static.cnodejs.org/Fm906q2h7Ql7mSt2wtV8BaqMrE8o)
	
	![3.png](//static.cnodejs.org/FjugP-xsvrxTXFi7BRoaRFOBxAFu)
	
	![aa.jpg](//static.cnodejs.org/FhMWQG-XL6v65VKOZjcPhrIi_A01)